Windows 2003 Server Static IP resets to DHCP on reboot

I have a customer who has a Dell Server running Win 2003 R2 Server. This is an existing machine that we had setup with a static IP. Now they want to change it to another static IP.

When they go and change it, hit ok, then reboot. The config is back to the old IP #.

The user is the administrator.

My guess is it has to do with AD & GP, a virus, an already in use IP#, or something else?

Anyone have any ideas what else could cause this behavior?

From serverfault shaiss

• Most servers have at least 2 NICs, are they definitely setting the new address on the right one?

  From MarkM

• Does it work after changing the IP, before rebooting? Rebooting is not required to change an IP address.

  Is there any anti-virus or security software that may be overzealous in protecting network settings?

  From DrStalker

• Broadcom NICs? Its a known issue. I can't remember the solution exactly, but if you call Dell support, they should be able to help you in a few minutes.

  Basically this is due to a package not installed properly during Dell automated install (or maybe vice versa - you HAVE to use the OMSA CD to install the OS)

  Just call support - it's a well documented issue, easy to solve

  shaiss : still looking in to this. Our user is going through upgrading their nics. We'll see if that helps at all, then I'll mark this as answered. Thank you

  Hondalex : This is why we don't use the broadcom NICs, we always get Intel NIC cards to save us any trouble.

  dyasny : Hondalex, b-coms are OK when you know their quirks, and this issue has been around for years now - there's an easy and well documented solution available, only one support call to Dell away
  From dyasny

• I had a similar problem on a Dell PowerEdge 1950 with Broadcom NIC's installed. Running "netsh reset int ip" from a command line fixed it.

  From joeqwerty